Rockwell Automation 1746-NI16V SLC 500 Analog Input Modules User Manual - Manual (Page 58)

Publication 1746-UM001A-US-P
5-10 Channel Configuration, Data, and Status
Scaling the Channel Data
Word This section provides descriptions of how the data types are
expressed in the channel data word and examples of how to
mathematically convert the data.
Data Type Descriptions
The engineering units are 1 mV/step for voltage input types and
1.0 µA/step for current input types.
The scaled-for-PID value is a 14-bit unsigned integer, with 0
representing the low-scale value and 16,383 representing the full-scale
value minus 1 LSB. The input signal range is proportional to your
selected input type and scaled into a 0-16,383 range, which is standard
to the SLC PID algorithm.
The proportional count value is a 16-bit signed integer. The input
signal range is proportional to your selected input and scaled into a
-32,768 to 32,767 range.
Channel Data Word Values for Scaled Data
Input Type Signal Range Scaled-for-PID Proportional Counts (default) NI4 Data Format
±10V dc -10.00V to +10.00V 0 to 16383 -32768 to 32767 -32768 to 32767
0 to 5V dc 0.0V to +5.00V 0 to 16383 -32768 to 32767 0 to 16384
1 to 5V dc +1.00V to +5.00V 0 to 16383 -32768 to 32767 3277 to 16384
0 to 10V dc 0.0V to +10.00 V 0 to 16383 -32768 to 32767 0 to 32767
0 to 20 mA 0.0 mA to 20.0 mA 0 to 16383 -32768 to 32767 0 to 16384
4 to 20 mA 4.0 mA to 20.0 mA 0 to 16383 -32768 to 32767 3277 to 16384
±20 mA -20.0 mA to 20.0 mA 0 to 16383 -32768 to 32767 -16384 to 16384
0 to 1 mA 0.0 mA to 1.00 mA 0 to 16383 -32768 to 32767
0 to 1000
(1)
(1) This data format is not supported by the 1746-NI4 module, but is available for the 1746-NI8 and 1746-NI16 modules.